This creature looks like an enormous black worm with a foul smell. From its body, several tentacles wave in a sinister way.

These rare-to-find creatures often live near big sources of their food, they eat great quantities of dead meat. A mature carrion wurm is 5 feet in diameter and 80 feet long, weighing about 40,000 pounds. Since it eats only carrion, sometimes it needs to make some from scratch by killing alive creatures if there is not carrion nearby.

Carrion wurms attack living beings only if there is no other means to get carrion, it attacks with its powerful tentacles, when its opponent dies it is often quite ready to eat.

Improved Grab (Ex): To use this ability, a carrion wurm must hit with its bite attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity. If it wins the grapple check, it establishes a hold and can attempt to swallow the foe the following round.

Swallow Whole (Ex): A carrion wurm can try to swallow a grabbed opponent of smaller size than itself by making a successful grapple check. Once inside, the opponent takes 2d8+23 points of crushing damage plus 8 points of acid damage per round from the worm’s gizzard. A swallowed creature can also cut its way out by using a light slashing or piercing weapon to deal 25 points of damage to the gizzard (AC 17). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out. A Gargantuan wurm’s interior can hold 2 Large, 8 Medium, 32 small, 128 Tiny, or 512 Diminutive or smaller opponents.

Constant Insight (Su): A carrion wurm makes all its attack with a +15 insight bonus. A carrion wurm is not affected by the miss chance that applies to attacks against a concealed target.

Rotting Constriction (Ex): Once a carrion wurm has hold of an opponent, each successful grapple check it makes during subsequent rounds permanently drains 2d4 points of Constitution. At the same time, the carrion wurm regains 10 lost hit points.

Alternate Form (Su): At will and as a standard action, a carrion wurm can take the form of a gargantuan mass of tentacles, it loses its swallow whole ability but enemies receive a –1 moral penalty on their attack roll against it.